In the Costa Brava region of Spain, July is the hottest month of the year. During 2026, average daytime high temperatures in July typically hover around 29°C to 30°C (84°F–86°F), though recent climate trends have seen occasional heatwaves pushing temperatures well above 35°C (95°F). The sea breeze along the Mediterranean coast provides some relief, but the humidity can make it feel warmer than the inland regions of Catalonia. August is a very close second, often feeling more oppressive because the sea temperature reaches its peak (around 24°C or 75°F), offering less of a "cooling" effect for those swimming. For travelers in 2026, July offers the most consistent sunshine and the least rainfall, making it the peak season for beach activities in towns like Tossa de Mar and Calella de Palafrugell. If you prefer slightly milder heat but still want "beach weather," June and September are increasingly popular alternatives with temperatures staying in the comfortable mid-20s.